Adjusting and holding means for rotary disk tools and the like



Jan. 4, 1949. v E, s m T I 2,458,216

' ADJUSTING AND HOLDING MEANS FOR ROTARY DISK TOOLS AND THE LIKE r 2Sheets-Sheet 1 Filed May 16, 1945 i v M 16 Me/ 42 13\ 7 m fl 26 Z9 70.'16 17 5'24:

. A. ADJUSTING 'AND H0 2,458,216 ROTARY Jan. 4, 194,9. E. SPINDT LDINGMEANS FOR DISK TOOLS AND THE LIKE 2- Sheets-Sheet 2 7 Filed May 16, 1945INVENTOR. d5

TORNEK Patented Jan. 4, i94

ADJUSTING AND HOLDING MEANS FOR ROTARY DISK TOOLS AND THE LIKE Alvin E.Spindt, Hammond, Ind.

Application May 16, 1945, Serial No. 594,093

1 Claim. 1

The invention relates to means for adjusting a rotary tool of the disktype upon a rotary shaft so as to present the working periphery of thetool at a desired angle to the work and it consists in theconstructions, arrangements and combinations herein described andclaimed.

More specifically, it is an object of the invention to provide a rotarytool holder and adjusting means wherein the tool may be set at desiredangles with respect to a rotary shaft upon which it is mounted, suchangular adjustment of the tool controlling the path of peripheral travelof the working edge of the tool, which may vary from a straight rotarymovement to a direction generally parallel to the rotary shaft.

It is also an important object of the invention to provide a tool holderparticularly well adapted for the mounting and secure retention ofcircular disk devices, such as saws, buffing wheels, grinding wheels,brushes and similar appliances, upon shafts not especially constructedfor the mounting of such appliances.

Additional objects, advantages and features of invention will beapparent from the following description considered in conjunction withthe accompanying drawings, wherein Figure 1 is a vertical sectionthrough the appliance as applied to a circular saw.

Figure 2 is a cross section on the line 2-2 of Figure 1. I

Figure 3 is a sectional view of one of the adjusting collars.

Figure 4 is an inside plan view of one of the holding collars.

Figure 5 is a section on the line 5-5 of Figure 4:.

Figure 6 is an elevation, partly in section, of a modified form of theappliance.

Figure '7 is a sectional view of the modified form of Figure 6,illustrating one stage of assembling upon a shaft.

Figure 8 is an end view thereof.

Figure 9 is a cross section on the line 9-9 of Figure 7.

Attention is first invited to Figure 1 of the drawings wherein there isshown a shaft Ill, which may be rotated by means of any suitable powersource, not shown, upon. which the tool holder and adjusting means H ismounted.

The appliance I! consists of a pair of adjust- 2 i6 adapted to restflatly against a flat face of a tool to be secured upon the shaft, thespherical surface of the collars being presented outwardly forcomplementary seating engagement of respective holding collars, as willbe explained.

A bore I! is formed axially through the collars of a diameter at theplaniform face I6 to receive the shaft Iii therethrough, the walls ofthe bore at diametrically opposite sides, tapering upwardly anddownwardly as indicated at I8, the tapered walls terminating inwardly ofthe spherical surface and outwardly relieved to define respectiveshoulders [9 arranged in opposed relation to one another. The remainingwall portions of the bore extend parallel with the shaft ill and are ofthe same diameter as the bore portion ll. Thus an elongated slot 20 isformed opening upon the sphericalsurface of the adjusting collars.

A pair of set screws 2| are threadedly engaged in bores 22 of the collarI2, arranged in opposed relation, the direction of travel of the screwscorresponding to the major axis of the elongated slot 20.

Reference is now made to Figures 4 and 5, for an understanding of theconstruction of the holding collars t5, wherein it will be seen that thecollars are formed with a semi-spherical recess 23 of a size to providea fit upon the spherical.

face of the adjusting collar and permit oscillatory movement in onedirection of the adjusting collars. Within the recess 23 a pair of lugs24 are formed positioned upon diametrically opposite sides of an axialopening 25 formed through the collars. The lugs 24 project from therecess 23 a distance, and are of a width to be received within theelongated slots 20.

A threaded bore 26 is formed in the collar l5 and receives a set screw21, the bore extending so as to lie in the same plane as the elongatedslot 20.

To install the appliance upon the shaft ID, the holding collar [4 ispositioned upon the shaft as shown, and the adjusting collar l2 thenmoved into position upon the shaft, the spherical face being presentedto the recess 23 with the lugs 24 disposed in the elongated slot 20. Thetool 28 is now positioned on the shaft by presenting the latter throughan axial opening 28' thereof. In the present instance, the toolrepresents a circular saw, one flat side thereof engaging the planiformface of the adjusting collar Ill. The adjusting collar 13 may now bepositioned on the shaft and moved inwardly to dispose the planiform faceagainst the saw body and finally the adjusting collar l 2 is arrangedupon the shaft, the lugs 24 disposed in the elongated slot 20 and therecess seating upon the spherical face of the collar l2.

The collars l2 and I3 are forced into frictional contact with the sawand with the holding collars M and I5 by screwing the set screws 21inwardly so as to engage in the keyways 29 formed in the shaft. Thepoints of the set=screws21tend to slide down the'keyways moving theholding collars inwardly along the shaft thus efiectivel tightening theentire assembly.

Angular adjustment of the-saw with respect' to the shaft I is obtainedby adjustment of t'he set screws 2 l, and as shown in Figure 1, thelowermost set screw 2| has been withdrawn aTicFth uppermost screw hasbeen moved inwardly such adjustment of the screws effecting a rotarymovement of the adjusting collars I2 and I 3' to -tlie left until thelugs 24 enga e respective shoulders I9 with-consequent movement of thesaw, the peripheral .edgezof which is :spacedfrom a trans.- verseaxisofthe shaft-.10,- andunderirotation of the saw and the tool holder,itwill-beaseenthat the teethiofther saw. will follow individual lines oftravel asindicated by (lot and'dash lines in Figure 1, andwould-'produce'akerfIM-ina piece of work parallel to the shaft I01 Itwill be -ap-- parentthat by the adjustment .of the saw inangularrelation-with'respecttothe-shaft, the need for setting f the sawteeth iseliminated, as well as .avoidingthe need for specialsawsefor cuttingwide grooves'or kerfs.

Obviously, ,various. degreesof tilt ofv the toolcan be obtainedquicklyand accuratelyby merely:

adjusting, the set screws 2! .as required, without readjustment of theholding collar,

In. the modified forms of .the deviceshown in Figures 6 to 9, thestructure of the holdingandadjusting means is. the same -as-the first.form just. described,-. except that-the holding collars are eachprovided with .apair. of diametrically opposite disposed set screws 2-1.and the adjuste ing collars l2 and I3 are similarly providedvwith,

set screws ,2 l-.. Also the shaft I Oisshown as having athreaded, endfor. mounting ofa nut 3-! In Figure 6, the tool 28" is.adjusted--upon=the-; shaft atright angles thereto. so as to rotate in:a'.. path. concentric thereto, but, obviously: the toolmaybeangularly,adjusted with respect to the. shaft by adjustment of thescrews 21'. The de.--

gree ofadjustment canbedetermi-ned-by the use.

of a graduated. scale 32,v fixedto ahsupport'not-l shown.

The.,holding collars-l4 andml5 of--F'igure1;7.areillustrated as slightlywithdrawn from. thead'juste ing collars l2 and I3 to more clearly,illu'stratethe construction, and also since the tool 28" represents abrush, the body of which is quite thick, the axial opening 33 is shownas of tapered formation, thus defining a reduced bearing contact with 5the shaft and permits adjustment of the brush to the desired angle.

While I have shown and specifically described the invention, this is byway of illustration only, and" I 'consider'asamy own allsuchimo'difications in construction as fairly fall within the scope ofthe appended claim. Iclaim: I

Meanseforholdin and adjustin a rotary disk tool 'atan angle. withrespect to a rotary mount:

ing shaft extended axially therethrough, said nieanscomprising a pair ofsemi-spherical memberseach having-.a planiform flat face adapted toengage respective sides of the disk tool, each semi-spherical memberhaving an interior passage including a bore at xsaid flat face of adiamter to receive said shaft, oppositepor'tions! otzsaid passage:tapering insan. outward direction, ,tlre'sree mainingiportions ofsaid.passage.= beinggthe same. as said:bore, the tapered :portions; ofsaidcpassage being relieved to :formshoulders-inwardly; of :the:spherical: surf ace. and to f orm; an elongated islot: oft-saidspherica-lesurfaee; .holdingmol lars. removablyc 'securable onthe::shaft; each .acoliarchavingi V a semi-spherical; recessicompleinenta'l. to: the

spherican surface of: said semi-spherical bers, said. collars: havinglug, members disposed: withinrespectiveelongatedslots for:lioldingpsaidc semiespherical membersagainst rotation'iwith re:-

spect i to the shaft, and- .set screwstthreadedlyrene; gaged in oneofsaidcsembspherical"memb'ers texe tended; transverselyi across"th'ectapered portions of 7 said passage to contact said I shaft: at--dice metrically opposite;sideswandnadjustable tor-move:

saidtsemi-spherical membersan'd said disl'cstool at;

anangleto theshaft.-

E; SPINDTs scream-aces omen...

T l ie following refrences' are of record in the. fileof 'tl' iis patenti UNITED" s'rATEsPA'IENTs'; I

Date;

Number Name-z 15,130-:- Hnttontse .Ju ne L7; 1 856 658,212 GarrisonSept. 418,5. 1900 3 1505?,4-25? Henrikson e- Apr. 1; 1913 1,308,297Olson 1;; 1919- 1,863,913: Schmidt .June 21, .1 9B2 H FOREIGN PATENTSNumber Country Date:

Great Britain Feb? 19,=,1-903

